An embryo is directly nourished by root-like extensions from the

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Chorionic villi are the root-like extensions from the developing embryo that grow into the uterine lining and enable the exchange of nutrients, oxygen, and waste with the mother's bloodstream. The amnion is a membrane that surrounds and protects the developing embryo, while the blastula is an early stage of embryonic development. The zygote is the initial cell formed by the fusion of sperm and egg.

An Embryo Is Directly Nourished by Root-Like Extensions from the